Portable audio device



FIG. 1 is a top, front, left perspective view of a portable audio device;

FIG. 2 is a back, bottom, right perspective view thereof;

FIG. 3 is a top-view thereof;

FIG. 4 is a bottom-view thereof;

FIG. 5 is a left-side view thereof;

FIG. 6 is a right-side view thereof;

FIG. 7 is a front-side view thereof; and,

FIG. 8 is a back-side view thereof.

Within the drawings, the dashed lines show unclaimed portions of the claimed design. None of the broken lines form part of the claimed design. 

CLAIM The ornamental design for a portable audio device, as shown and described. 